Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcca6e3fcfb522b…

MALICIOUS

PDF

107.0 KB Created: 2021-09-15 21:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eeeb83aaefb86c5a60efb38c8d5bea59 SHA-1: b89f8a8e152f39e172d8e3f5067d2f8ade298a26 SHA-256: fbcca6e3fcfb522be4b1c4f19774233e116452d2cbc921146910e07291be9309
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1598.003 Subdomain Acquisition T1204.001 Malicious Link

The PDF contains a link farm and a specific URL designed to impersonate Facebook, luring users to click a link that does not match the brand's domain. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing lure. The presence of multiple external URLs, including those hosted on compromised CMS uploads and disposable hosting, further supports the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://synerhu.ru/uplcv?utm_term=ispoofer+pokemon+go+link.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://synerhu.ru/uplcv?utm_term=ispoofer+pokemon+go+link PDF link annotation
    • https://eletvital.hu/uploads/files/68159760107.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/televaloxa.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/gelusofasujijute.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/wupaxidarib.pdfIn PDF document text
    • http://proart.by/media/file/kureki.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0b4d89870---30478283818.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/buxewixomoz.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/923c8e0f125dd8bc496ac01e937f5bc7/29383145361.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/gububumuwigofixekotivor.pdfIn PDF document text
    • http://sdes.in/uploads/jipofunibiga.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/59847292243.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021932055461003.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/madufetijoxejovejesape.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/jaxufujomavowubitube.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/2021912720172480.pdfIn PDF document text
    • https://alpinashop.bg/files/wupopoporowi.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/naxidezodi.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/nubimovajelavebebar.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/fekuteveluzeriko.pdfIn PDF document text
    • https://skywaynepal.com/userfiles/file/zinipevavavanawugoxabalek.pdfIn PDF document text
    • https://5udua.com/contents/files/nopur.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/91158561131.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614076ed0132b---33139553823.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/rruffahscru03ptob6kdfubn4v/miremeg.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBF 10484 bytes
SHA-256: 519ca32b159bc6b0540429658b6f9d45b34b7fafe82fb71aa8b9505dc428f871
font_02_sfnt_off0001477d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1477D 24836 bytes
SHA-256: 6041cb4e4c3e2e133e39689f0476661fc82efee32ebf737cef1f56cad30c1bce
font_03_sfnt_off000187c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187C2 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d

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